Nagasaki Schizophrenia Study : Outcome of a 15-year Follow-up of an Incident Cohort

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The Nagasaki World Health Organization (WHO) Collaborating Center for Research and Training in Mental Health conducted the WHO Coordinated Multi-Center Study of the Long-term Course and Outcome of Schizophrenia as a part of the International Study on Schizophrenia (ISoS). The study used 107 patients who were initially diagnosed as having ICD-9 schizophrenia for the WHO Collaborative Study on the Determinants of Outcome of Severe Mental Disorders (DOSMeD). Subjects were first collected in 1979-1980 for an incidence study of schizophrenia in Nagasaki. In this 15-yearfollow- up study, 7 subjects died, 43 subjects were lost to follow-up and 57 were successfully traced. Among the 7 death cases, 4 suicides were confirmed and 1 was suspected. During the 15-year period, 25 (44%) of the 57 living subjects displayed continuous psychotic course type schizophrenia. During the last 2 years, 14 (25%) were not psychotic ; 31 (54%) were continuously psychotic. Global Assessment of Functioning Scale for Symptomatology (GAF-S) indicated symptomatological outcomes : 16 (28%) had severe symptoms (GAF-S<51), and 17 (30%) were symptom-free (GAF-S>70). Social outcome was evaluated using the Global Assessment of Functioning Scale for Disability (GAF-D): 28 (49%) showed poor adjustment (GAF-D<51), and 23 (40%) were functioning well (GAF-D>70). The overall time trend was almost evenly divided in thirds : 20 (35%) were getting better, 18 (32%) were the same and 19 (33%) were worse. The present study showed that the outcome of schizophrenia is not always poor, although some patients display a continuous course and poor outcome.
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Nagasaki Schizophrenia Study : Outcome of a 15-year Follow-up of an Incident Cohort

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